消费者郭女士日前反映，她在京城某大商场获得的奖品，质量存在问题，和商家交涉了两年仍未解决。近来，因奖品质量问题引发的消费纠纷越来越多。特别是新年伊始，厂家、商家推出的各种有奖促销活动又达到了一个高潮。但奖品的质量由谁把关？售后服务如何保证？消协及技监... Ms. Guo, a consumer, recently reported that she had problems with the quality of the prizes she had received at a major shopping mall in the capital and that negotiations with the business for two years remained unresolved. Recently, more and more consumer disputes have arisen due to the quality of prizes. Especially at the beginning of the new year, various award-winning promotions launched by manufacturers and merchants reached a climax. But who will check the quality of the prize? How to ensure after-sales service? Consumer Association and Technical Supervision...